ey vasa” = al See NR: ATRIA S jira ic pa aaemnummmrteie Sacra mm ith : 
and the Velocity of the Wind. 359 
and both the inertia of the air and the friction belonging to 
this motion are overcome by the force arising from almost in- 
with the latitude, and should be somewhat in proportion to 
sin?/, This is shown to be the case from observation. In the 
1 Mean monthly ranges.) 1°6 in. sin*Z. 
0° 0°1 in, 0°0 in, 
30 or4 0°40 
45 1°0 0°80 
65 1°33 1°30 
78 12 1°36 
Of course we cannot expect a vey nice agreement in the last 
two columns, since there are several circumstances besides lati- 
* Loomis’ Meteorology. 
